Feed gb



Jun 1927.

e 14 J. KOCH v FEEDGRINDER Filed Aug. 27. 1926 Inventor Ja/zrp five/v,

Patented June 14,' 1927.

UNITED STATES :romv zoom. on nus'rrs, ivnnaAsxA.

PATVIENT OFFICE.

f man enmnnn.

Application filed August 27, 1926. Serial no. 131,920.

The object of my present invention is the provision of a simple, durableand eflicient apparatus for grinding snap, corn, ear corn,

vertical section and partly in side elevation showing an embodiment ofmy invention which has been reduced to actual practice and successfullyoperated in this country.

Figure 2 isan enlarged fragmentary section on line 2 2 of Figure 1.

Similar numerals of reference designate corresponding parts in bothfigures of the drawing.

By reference to the drawing, my novel apparatus as illustrated will beunderstood as comprising an endless conveyor 1 for feeding stock to beground, and an endless conveyor 2 for taking ground feed from theapparatus and delivering the same to a pendent spout 3, an appropriatemain frame 4, a concave screen 5,. preferably of reticulated material asillustrated, carried in the frame 4 and above a casing wall 6 and alsoabove the lower portion of the conveyor 2, a hood section 7, hinged at8, and designed to be detachabl secured in working position at 9, and acy inder 10 having journals 11, disposed in bearings 12 on the mainframed,

which bearings are preferably equipped wlth oil cups 13. The cylinder 10is provided i with an imperforate peripheral portion 14,

and on the outer side of the said peripheral portion 14 are bars '15,equipped with ham-' mers 16. The alternate bars 15 are provided withfour spaced hammers 16, and the other bars 15 are provided with fivespaced hammers 16, and in the preferred arrangement the hammers aredisposed in staggered relation so that the hammers of the four serieswillbe opposite the s aces of the hammers of the five series. T ecylinder 10 is designed to be driven in the direction indicated by thecurvilinear arrow in the draw- The hood section alluded to is providedwith a throat portion 17,. and disposed in said throat portion 17 is apendent and swingable trap door 18, the function of which is to preventretrograde movement of the grain in the throat 17 which is designed toserve after the manner of a hopper.

Carried by the topwall of the hood sectlon 7 are spaced transverse bars19. The hammer bearing cylinder is designed to be rotated at a high rateof speed, and it serves to throw the grain up against the cross bars 19,and the said cross bars 19 operate to retard the grain so that thehammers 16 strike the grain before the same passes to the saw teeth, thesaid saw teeth which are designated by 20 being carried by the forwardcurvilinear portion of the hood section top as illustrated. The said sawteeth 20 serve in practice to riddle and retard the grain so that thehammers 16 can operate again on the grain before the same passes throughthe screen 5.

It will be appreciated from the foregoing that in the operation of mynovel grinder, the'feed is at the back, and consequentlthe hammers 16first catch the grain and 't row the same upwardly against the crossbars 19, which cross bars retard the grain and bring about a backwardmovement of the same, so that the major portion of the grain is groundby the cooperation of the hammers 16 with the .cross bars 19. .It willalso be understood that in the operation of my novelgrinder the grindinghammers 16 run free and hence it is feasible to rotate the cylinder 10at a high rate of speed. Manifestly in the event of choking takingplace, the hood section 7 maybe readily swung upwardly to afford accessto the space between the cylinder and the hood section portion .opposedto the cylinder, whereupon any congested mass may be expeditiously andeasily removed.

Actualpractice has demonstrated that my the grain until the grain isreducedto par-- ticles sufliciently fine to pass through the intersticesof the screen, whereupon the particles will gravitate to the dischargeconveyor 2 to be carried to the spout 3 or to any other desired point ofdischarge.

The saw teeth 20 are arranged in sets on curvilinear bars, one set ofteeth to each bar asshown in the drawing, and the bars are spaced aboutone inch apart throughout the width of the topof the hood section 7, andso that the teeth do not come in contact with the hammers 16. The saidbars carry ing teeth 20 are suitably fixed to the said hood section top,Figure2.

Havin described my invention, what I claim an desire to secure byLetters-Patent, 1s:--

1. In a feed grinder and in combination, a casing, a concave havingopenings, supported in the casing, a'throat or hop er leading to thecasing and having its ischarge portion disposed above one end of saidconcave, a cylinder mounted to be rotated in the casing and havingspaced hammers on its perimeter, spaced cross bars carried by the top ofthe casing in front of the throat and extending downwardl from saidcasing top,'and teeth carried y the casing top and arrangedcurvilinearly in front of the said spaced cross bars with reference tothe direction of rotation of the cylinder; the

peripheral portion of the cylinder being in perforate, and the spacebetween the c linder and the curvilinearly arranged teet being ofless-width than the space between the c linder and the transverse bars.

2. n a feed grinder and in combination, a casing, a concave havingopenings, supported m the casing, a throat or hopper leading to thecasing and having its discharge portion disposed above one end of saidconcave, a. cyhnder mounted .to be rotated in the casing and havingspaced hammers on its perimeter, spaced cross bars carried by the top ofthe casing in front of the throat and extending downwardly from saidcasing 85 top, and teeth carried by the casing top and arrangedeurvilinearly in front of the said spaced cross bars with reference tothe direction of rotation of the cylinder; the peripheral portion of thecylinder being imperforate, the space between the cylinder and thecnrvilinearly arranged teeth being of less width than the space betweenthe cylinder and the transverse bars, and the said throat or hopperbeing equipped therein with a pendent swingable door.

3. In a feed grinder and in combination, a casing body, a concave havingopenings, supported in said body, a superposed hood section hinged atone end to the casing body and detachably connected at its opposite endto said body and capable of swinging, the said hood section having athroat or hopper leading to the interior of the easing and also havingon the inner side of its top, cross bars extending downwardl from saidtop and further havlng a forwar curvilinear portion and teeth arrangedcurvilinearly at the innerside of said curvilinear portion and in frontof the said spaced cross ars; a cylinder mounted to be rotated on and inthe casing body and having spaced hammers on its perimeter and alsohaving an imperforate perimeter, the space between the imperforateperimeter of the cylinder and the eurvilinearly arranged teeth being ofless width than the space between said perimeter and the cross bar.

In testimony whereof I aflix my signature.

J OHN, KOCH.

